kinship vs similitude

kinship

noun
  • relation or connection by nature or character 

  • relation or connection by blood, marriage or adoption 

similitude

noun
  • A way in which two people or things share similitude. 

  • Similarity or resemblance to something else. 

  • Someone or something that closely resembles another; a duplicate or twin. 

  • A parable or allegory. 

How often have the words kinship and similitude occurred in a corpus of books? (source: Google Ngram Viewer )